also: えづく
godan verb (-ku), intransitive verb
retch; feel like vomiting; throw up
Kansai dialect word, archaic in standard Japanese. Describes the act of retching or feeling nauseated, often without actually vomiting.
朝からずっとえずいてる。
I've been retching since morning.
その臭いでえずきそうになった。
The smell almost made me throw up.